Vocabulary 1
What is a hypothesis?
a testable prediction
example: If we increase the temperature of the water, the flowers will bloom slower
What units do you measure temperature in?
Degrees C
What is the independent and dependent variable:
If we increase the height of the ramp, the toy car will increase in speed
Independent - height of the ramp
Dependent - speed of the toy car
What does accuracy mean?
How precise you can measure something
What units do you measure distance in?
Km, m, cm, mm
How do you calculate an average?
Examples to help explain:
T1 - 3
T2 - 4
T3 - 2
You add all trials together for one result and then divide by how many trials there are
What is the independent and dependent variable:
If you increase the temperature on the water, the salt will dissolve faster
Independent - Temperature of the water (degrees C)
Dependent - How fast the salt dissolves (seconds)
What units do you measure volume in?
L, ml
What is the independent and dependent variable:
If a plant receives more sunlight, it will grow taller
Independent - How much sunlight a plant gets
Dependent - how tall the plant grows (cm)
What units do you measure mass in?
mg, g, kg
What is the independent and dependent variable:
If more baking soda is added to vinegar, then the reaction will produce more gas
Independent - the amount of baking soda (g)
Dependent - how much gas is produced (ml)
What units do you measure time in?
milliseconds, seconds, minutes, hours
What does doing multiple trials in an investigation help with?
makes the results more trustworthy and reliable
What is the independent and dependent variable:
Students who eat breakfast in the morning perform better on tests than students who don't.
Independent - Whether students eat breakfast or not
Dependent - the student scores on test